Window construction



y 1952 H. M. MOKAY 2,595,595

wmnow CONSTRUCTION Filed Abril 18; 1949 HARRY M. MC KAY ZhwentorGttorneg mounted in a frame.

Patented May 6, 1952 UNITED STATES PATENT OFFICE 2,595,595 WINDOWCONSTRUCTION Harry M. McKay, Winfield, Kans. Application April 18, 1949,Serial No. 88,100

2 Cla'nns.

This invention relates to a new and useful construction in which awindow sash is slidably As is well known, it is desirable for the sashto slide easily in its frame to facilitate the opening and closing ofthe window. It is also necessary that some means be provided formaintaining the sash in whatever position of elevation it may be placed.This is commonly done at present by attaching an end of a sash cord toone edge of the sash, running the cord over a pulley mounted near theupper end of the window frame, and attaching the other end of the sashcord to a weight capable of balancing the weight of the sash, the weightbeing enclosed in a casing built into the side of the frame. Thisconstruction involves considerable labor time and is thereforerelatively expensive.

It is an 'object of this invention to provide a sash which fits'astandard window frame, which employs friction to maintain it at anydesired position of elevation, and which therefore eliminates thenecessity of using the conventional sash cords and weights. Naturallythe construction also eliminates the labor and material ordinarilyrequired to provide a weight or balance casing at the sides of thewindow frame to accommodate the counterbalancing weights.

"It is another object to provide a sash which may be easily and quicklyinstalled in or removed from a standard window frame after the frame hasbeen completed, without having to remove or replace either the blindstop, the parting stop, or the interior molding of the frame.

It is' still another object of the invention to provide a sash which isso constructed as to compensate for the normal expansion and contractionin overall width due to outside weather conditions. thus eliminatingsticking of the sash in its frame due to an extreme increase in frictionagainst the jambs of the frame.

Another important object of the invention is to provide an attachmentcapable of converting any conventional wooden sash into a sash of thetype mentioned above, so that it can be replaced in its original framewithout the necessity of modifying the frame in any way, and without thenecessity of using the balancing weights with which the sash wasoriginally provided.

Another object is to provide a sash having the characteristics mentionedabove, and which is also capable of being installed with or withoutweather stripping.

Generally the invention comprises an elongated hollow trough, preferablyof thin sheet metal, of such size and shape as to telescopically 2receive and fit over one side edge of a window sash after a portion ofits extreme side edge has been removed. The trough then fits into thechannel of the window frame, and the trough is pressed outwardly againstthe jamb of the frame by means of springs bearing against the sashproper and against the inside surface of the trough, the frictioncreated by the spring pressure being ample to maintain the sash in anyposition of vertical adjustment in its frame.

The details of construction of a preferred em-: bodiment of theinvention, together with other objects attending its production, will bemore clearly understood when the following description is read inconnection with the accompanying drawings, in which:

Fig. 1 is a perspective view of a sash embodying one form of theinvention;

Fig. 2 is a fragmentary sectional view taken vertically through theright hand side of the sash of Fig. 1;

Fig. 3 is an enlarged sectional view taken along the line 3-3 of Fig. 2;and

Fig. 4 is a fragmentary horizontal sectional view through one verticalside of a complete window showing details of construction andinstallation of sashes embodying the invention in a different form.

Referring to that form of the invention illustrated in Figs. 1-3inclusive, the numeral lll designates a window sash as a whole, made upof parallel side members i l and I2, and parallel top and bottom membersl3 and I4, all connected together at their ends to form a. frame forreceiving and holding a pane IS. The side member I2 is preferablysomewhat narrower than the other members, and is adapted to fit snuglyinto a sheet metal trough permitting telescopic movement of said troughwith relation to the sash. The trough is designated as a whole by thenumeral I6, and is made up of two parallel sides I1 and i8, two parallelends I9 and 20, and an integral bottom 2 I.

Interiorly the trough it carries a plurality of metal guides 22. Theseguides preferably have a substantially cylindrical body 23, an enlargedflange type head 24 which is welded or otherwise rigidly secured to theinner surface of the bottom 2|, and a spring receiving reduced end 25.Each guide has a small central bore to slidably fit the shank of a screw26, and a connecting enlarged bore 21 to receive and permit slidablemovement of the head of the screw. The

which are aligned with the respective bores 21 to permit insertion ofthe screw from the outside of the trough.

The sash side member [2 is provided with a plurality of properly spaceddrilled blind holes 29, one for snugly but slidably receiving arespective one of the guides 22.

In installing a trough, such as described, on each window sash acompression spring 30 is first inserted into each blind hole 29. Theguides are then inserted into these holes and the walls of the troughsimultaneously slip over the side member of the sash. The screws 26 arethen driven into side member of the sash, as shown in Figs. 2 and 3,with the springs 30 slightly compressed. For appearance sake only thedistance between the trough bottom 2| and the inner edge of the sidemember 12 should be approximately the same as the distance between thecorresponding outer and inner edges of the side member I I, when thesash is installed in a window frame.

Installation is accomplished by first inserting the trough into thevertical slide channel of a window frame with the bottom of the troughin contact with the jamb 3| of the window, as shown in Fig. 4. Theentire sash is then forced toward the jamb 3|, compressing the springs30 a sulficient distance to allow the other side member ll of the sashto clear its vertical stop 32 at the other side of the window frame. Thesash is then released to the action of springs 30, and the side memberll enters its complemental vertical slide channel at the other side ofthe window frame. The springs 30 are of such length, and have suchcompressibility characteristics that the pressure of the trough bottom2| against the jamb 3| is not great, but is ample to create suflicientfriction between these two members to maintain the sash in any positionof elevation to which it is manually moved. Thus weights forcounterbalancing the weight of the sash are completelv eliminated.

It will be noted that the screws 26 are of such length that their headsclear the adjacent shoulders of the blind holes 29 when the sash isinstalled in a window frame. This spacing permits free action of thesprings 30, and suificient movement of the side member l2 with relationto the trough to compensate for overall contraction or expansion in thewidth of the sash as a. whole, due to changing temperature or moistureconditions.

The embodiment of the invention illustrated in Fig. 4 differs from theembodiment just described in one respect only. The adjacent side walls33 and 34 of each of the troughs l6 have reversely turned flanges 35 and36, respectively, lying in planes substantiallv parallel to the sidewalls 33 and 34 proper, and spaced therefrom a suificient distance tosnugly but slidably receive flanges 31 and 3B which are formed as anintegral part of a formed metal parting stop, designated as a whole bythe numeral 39. This parting stop 39 is substantially w-shaped in crosssection and extends from top to bottom of the window frame. It isanchored to the jamb 3| by a plurality of vertically spaced screws 49.The interlocking oi the flanges 35 and 36 with the flanges 31 and 38form a weathertight joint between the sash and 4 its frame-a joint whichpermits free sliding of the sash.

Having described the invention with sufficient clarity to enable thosefamiliar with the art to construct and use it, I claim:

1. A friction type sash balance and variable lateral extension for awindow sash comprising a trough having parallel ends, parallel sides anda bottom, and of a size to complementally and telescopically receive andenclose one side edge of the sash; a plurality of longitudinally spacedaxially bored and counter bored elongated guides projecting inwardlyfrom and rigidly secured to the bottom of said trough perpendicularthereto, the counter bores being located adjacent said bottom; holes insaid bottom aligned with said counterbores; cooperating seats in theside edge of said sash for complementally and slidably receiving saidguides; compression coil springs housed in said seats and bearingoutwardly against the inner ends of said guides; and screws passingaxially through the guides, through the springs and anchored in the sideedge of said sash, the heads of said screws being of larger diameterthan the smaller bores in said guides, and seated in the counter boresthereof to limit outward spring pressed movement of said guides andconsequently of said trough, the relative depth of the seats in saidsash being such that the overall width of the sash, when the trough isfully telescoped over said one side edge, is less than the width of thefixed window frame in which the sash is adapted to be slidably mounted,whereby the sash can be easily installed in and removed from the windowframe.

2. A friction type sash balance and variable lateral extension for awindow sash comprising: a trough having parallel ends, parallel sidesand a bottom, and of a size to complementally and telescopically receiveand enclose one side edge of the sash; a plurality of longitudinallyspaced guide receiving slideways cut into said one side edge of the sashat right angles thereto; similarly spaced guides each having an endsecured to the inner surface of the bottom of said trough, and adaptedto be received into and guided by said slideways; a spring in eachslidewaybearing against the adjacent end of each guide to urge theguides and the attached trough outward with relation to the sash; andmeans fixed to the sash and slidably connected to each guide to limitthe outward movement thereof with relation to its respective slideway.

HARRY M. McKAY.

REFERENCES CITED The following references are of record in the fileofthis patent:

UNITED STATES PATENTS Number Name Date 258,898 Davis June 6, 1882452,098 Collins May 12, 1891 525,260 Clark Aug. 28, 1894 689,769 WayDec. 24, 1901 1,308,625 Conover July 1, 1919 1,615,580 Hamel Jan. 25,1927 1,798,187 Brouillette Mar. 31, 1931 2,315,200 Guillaume Mar. 30,1943

